Atomic Structure Flashcards

All 6 cards in this deck

Where in an atom are protons and neutrons found?

In the nucleus at the centre of the atom.

What are the relative mass and relative charge of a proton?

Relative mass 1, relative charge $+1$.

What are the relative mass and relative charge of a neutron?

Relative mass 1, relative charge 0 (neutral).

What are the position, relative mass and relative charge of an electron?

Orbits the nucleus in shells; relative mass about $\frac{1}{1835}$ (almost zero); relative charge $-1$.

True or false? Almost all of the mass of an atom is in the nucleus.

True. Protons and neutrons are in the nucleus and electrons have almost no mass.

True or false? An atom has an overall negative charge because it contains electrons.

False. An atom has equal numbers of protons and electrons, so it is neutral overall.